Mounting rail



FIG. l is an isometric front, left side view showing my design for a mounting rail;

FIG. 2 is an isometric rear, left side view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a left side view thereof, the right side view (not shown) being a mirror image of this left side view.

The broken lines depict environmental subject matter and do not form a part of the claimed design. 

CLAIM The ornamental design for a mounting rail, as shown and described. 